Combined warp and weft stop mechanism for looms



Dec. 15, 1925. y 1,566,249

H. HQEBER i COMBINED WAR? AND WEFTQSQQP MECHNISM FOR Looms ,Filed Julbzi, 1925 '--2 Sheets-Sheet 1 H. HGEBER COMBINED WARP AND WEFT STOP MECHANISM FOR LOOMS Filed July 21. 1925 sneets-sneet 2 Patented Dec. 15, 1925.

UNITED STATES A 1,556,249 PATENT orifice.v

HAROLD HOEBER, OIEv NORTH BILLERICA, MASSACHUSETTS, ASSIGNOR TO DRAPER CORPORATION, F HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

COMBINED WARP AND "WEFT STOP MECHANISM FOR LOOMS.

Application fued'muy 21, 1925. serial No. 45,614.

To all 107mm t may concern.'

Be 1t known that I, HAROLD Honnu, a

citizen of the Unit-ed States, and a resident of North Billerica, in the county of Middlesex and State of Massachusetts, have invented an Improvement in Combined lVarp and Weft Stop Mechanisms for Looms, of which the following description, in connection with the accompanying drawings, is a specication, like characters on the drawings representing like parts. 1

This invention relates to looms and more particularly to the means for effecting loom stoppage on the occurrence of a warp or weft fault.

It is now the usual practice to provide looms with a warp stop mechanism and a weft stop mechanism to bring the loom to rest whenever a warp thread or a weft thread breaks or becomes otherwise unsuitable for weaving purposes, and one of the objects of the resent invention is to provide a train of) mechanism of simple and effective character for stopping the loom on the occurrence of either a warp or weft fault.

In accordance with the present invention, the warp and weft stop mechanism, which may be of any usual type, have associated with each a controller adapted to be moved on the occurrence of either a warp or weft fault and each acting through a mechanism to operatively position a single dog interlmediate the mechanisms for bringing the loom to rest when a fault occurs in either the warp or weft, and an actuator is provided for operating through the single dog, preferably on the backward movement of the lay, so that the warp threads may be properly positioned for piecing upA in the case of a warp fault and the weft threads may be more readily accessible.

The invention and the variousnovel features thereof will best be made clear from rthe following description and the accompanying drawings ofone good form thereof.

In the drawings:

Fig. 1 is a perspective view, parts being omitted, of a loom containing the present invention;

Fig. 2 is a perspective view with parts broken away, of one good form of warp stop mechanism which may be employed in connection with the present invention;

Fig. 3 is a perspective view o f-a weft stop mechanism with which the present invention may be associated; and

Fig. 4 is a sectional detail showing the stopping dog` and means for operatively positioning the dog on the occurrence of either a warp or a weft fault.

The loom frame 1 may be of usual construction and is provided with the lay 2 having a shuttle box 3 at each end thereof. Mounted on the loom frame is the shipper 4 which, when the loom is in operative condition, is retained, as usual, in a notch 5 on the shipper stand. Pivotally mounted on the loom frame at 6 is a shipper knock-off 7, the end S of which normally rests against the front portion of the shipper 4L and is adapted to detach it from its holding notch 5 to effect loom stoppage.

The warp stop mechanism may be of any usual type and as shown comprises the main portion 9 extending transversely of the loom and provided with warp supports 10 over which the warp threads a pass. Each of the warp threads ,a supports a drop wire 11 and so far as the invention in the present case is concerned, such drop wire may be of any usual type.

Pivotally mounted in the brackets 12 is a rock shaft 13 having affixed thereto the cam member 14 which engages a complementary cam member vor controller 15 loosely mounted on the rock shaft and actu-- lated to effect rocking movement of the rock shaft by means of an arm 16 which may be actuated from a rod 17, as usual in this type of warp stop mechanism. Between the collar 18 on the rock shaft 13 and the controiler 15 is a spring 19, the construction being' such that during normal operation of the loom, the rock shaft 13 will be given a yrocking movement below the drop wires 11, but on the occurrence of a warp fault, as when a warp thread becomes broken or too slack, the supported drop wire 11 will fall into the path of a feeler 2O connected by arms 21X to the rock shaft 13, and stop such rock shaft, whereupon the controller 15 will be moved longitudinally of the rock shaft. l

In accordance with the present invention, the movement of the controller 15l of the stop mechanism is utilized through a train of mechanism to be hereinafter described, to' operatively position a dog which is also under' the control of the weft stop mechanism, as will late'r appear. In the present instance, the train of mechanism between the warp stop motion and the dog comprises a flexible wire 2l within a flexible sheath 22.

The weft stop mechanism proper may be of any usual type and is herein shown as comprising a weft fork and weft fork slide which, on the occurrence of a weft fault, is moved frontwardly, as usual, and associated with the weft fork slide is a second controller which is movable by the weft fork slide on the occurrence of a weft fault and acts through a train of mechanism on the single dog, hereinbefore mentioned, to effect loom stoppage.

As shown, the weft stop mechanism comprises the stand 23 (Fig. 3) having mounted for sliding movement thereon the weft fork slide 24 which carries at its rearward end portion the usual filling fork 25, having a loop 26 which is adapted to engage a hook 27 connected to the weft hammer 28, as usual, to move the weft fork slide frontwardly on the occurrence of a failure of the weft.

Mounted alongside of the weft fork slide is a controller 29 having a slot 36 into which extends a pin 3l projecting from the weft fork slide 23, the construction being such that upon frontward movement of the weft fork slide, the controller 29 will be moved frontwardly and act through a train of mechanism, to be described, to operatively position the single dog to effect loom stoppage.

Pivotally mounted at 32 is a lever 33, the end 34 of which is adapted to be engaged by a projection 35 extending from the controller', to be moved thereby on the frontward movement of the controller. The other arm 36 of the lever 33 rests against a plate 37 to which is connected a plunger 38 adapted to act upon a flexible wire 39 (Fig. 4)V enclosed within the flexible sheath 40, the construction being such that upon the occurrence of a weft fault and the consequent frontward movement of the weft fork slide, the controller 29 will actuate the lever and move the wire 39 longitudinally in its sheath.

rlhe sheathed wire connection between the controller l5 of the warp stop mechanism and the controller 29 of the weft stop mechanism is found to be a convenient form of transmitting mechanism, but the present invention is not necessarily limited thereto, as any train of mechanism of convenient type associated with the respective controllers to effect movement of the dog, as will appear, is within the scope of the present invention.

In the loom herein described, there is preferably a weft stop mechanism at each side thereof, and in order to effect loom stoppage through the occurrence of a weft fault detected at either side of the loom, the controller 29 of the weft stop mechanism is provided with a projection or pin 4l which engages the hooked end 42 of an arm 43 operatively associated with the weft fork mechanism at the opposite side of the loom, the result being that upon detection of a weft fault at either side of the loom, the controller 29 will be moved frontwardly to actuate the train of mechanism for operatively positioning the Vsingle dog.

Secured to the loom frame is a bracket 44 carrying a boss or enlargement 45 in which is supported a dog positioner 46 which, in the present instance of the invention, is shown as a plunger. The boss 45 has secured thereto a guide 47 into which each of the flexible wires 2l and 39 extending from the warp and weft stop mechanism project, the end portions of the flexible wires resting against the lower end portion of the dog positioner or plunger 46. In the present instance, the guide 47 has an extension 43 against which the lower end of the dog positioner rests when in its retracted position, and the guide may be conveniently secured to the boss 45 by a set screw 49, the construction being such that upon the occurrence of either a warp or a weft fault, as hereinbefore described, the associated flexible wire r 21, or 39, as the case may be, will act upon the dog positioner 46 and move it longitudinally in the boss 45, (see Fig. 4).

Pivotally mounted at 50 on the boss is the dog carrier 5l to which is pivotally connected at 52 the dog 53, which may be provided with a fan-tailed end 54, and a light spring 55 normally acts upon the dog to keep it seated upon the projection or bearing 56 on the boss 45.

The dog has associated therewith the slide 57 (Fig. 4) which is preferably connected to the dog through the pivotal connections 52 on the dog, as indicated in Fig. 4, and connected to the slide 57 at 58 is a transmitter or rod 59, the other end of which is connected at 6() to the shipper' knock-off 7, as indicated in Fi l, the effect being that upon rearward movement of the slide 57 through similar movement of the dog 53, the shipper will be detached from its holding notch and the loom will be stopped. The slide 57 may be suitably guided in its reciprocating movement and, as shown, normally rests upon the bearing 56 of the boss 55, although any suitable guiding means may be employed.

Mounted upon the usual crank shaft 6l (Fig. l) is the cam or eccentric 62 about which passes a strap 63. The cam or eccentric 62 may be rotatively adjusted on the shaft 6l and held in adjusted position by a pin 64. The strap 63 has an arm 65 extending therefrom, to which is adjustably secured by a bolt 66 the actuator 67, the end jen lll)

portion 68 of which rests upon the sur-face 69 of the slide 57 and is normally maintained in operative position by an overhang 70 on the slide.

From the construction described it will be apparent that when the loom is operated with intact warp and weft threads, the actuator G8 will reciprocate towards and from the front of the loom above the dog 53 which is in its inoperative position at such times, but should either a warp fault or a weft fault occur, then the associated flexible wire 2l or 39, as the case maybe, will be moved longitudinally in its sheath to operatively position the dog 53 or raise it into the path of the actuator 68, with the result that the slide 57 will be moved rearwardly, detach the shipper from its holding notch and effect loom stoppage with the lay in its backward position. If desired to stop the loom in any other position of the lay, it is only necessary to adjust the cam or eccentric 62, to suit the required conditions. In any event, however, the warp stopv mechanism and the weft stop mechanism are combined with a single dog which will be operatively positioned upon the occurrence of' either a warp fault or a weft fault and effect loom stoppage.

The present invention provides not only means for stopping the loom on the occurrence of either a warp fault or a weft fault acting through a singlev dog, but provides simple and effective mechanism to this end which may be utilized to effect loom stoppage when the lay has reached any predetermined or desired position. This will usually be when the lay is in its backward position, because at such times the warp threads will be best positioned for piecing up the warp endsv and the shuttle will be in its box prior to the picking movement.

What is claimed is:

l. In a loom, the combination of warp stop mechanism and weft stop mechanism, a controller associated with each of said mechanisms, a single dog adapted to be operatively positioned to stop the loom by either of said controllers, and means actuated by a going part of the loom to actuate the dog when it is operatively positioned by either controller to effect loom stoppage on the backward movement of the lay.

2. In a loom, the combination of warp stop mechanism and weft stop mechanism, two controllers, one movable on the occurrence of a warp fault and the other movable on the occurrence of a weft fault, a single dog adapted to be operatively positioned by movement of either controller, and means to actuate the dog when operatively positioned by either controller to stop the loom on backward movement of the lay.

3. In a loom, the combination of warp stop mechanism and weft stop mechanism,

two controllers, one movable on the occurrence of a warp fault and the other movable on the occurrence of aweft fault, a single dog adapted to be operatively positioned by movement of either controller, a shipper, a shipper knock-off connected to the single dog, and means-to actuate vthe dog when operatively positioned by either controller to stop the loom on backward movement of the lay.

l. In a loom, the combination of a weft fork and slide, a controller movable by the slide on failure of weft, a dog operatively positioned by the controller to effect loom stoppage as the lay goes back, a warp stop mechanism, a controller movable with the warp stop mechanism on the occurrence of a warp fault to operatively position the same dog to stop the loom as the lay goes back, and an actuator operating through the dog to stop the loom on the occurrence of either a warp or weft fault.

5. In a loom, the combination of a series of warp drop wires, a controller adapted to be moved when a drop wire fails to be supported by a warp thread, a weft fork slide, a controller movable thereby on the occurrence of a weft fault, a single dog intermediate the two controllers operatively positioned by either, and an actuator for moving the single dog to effect loom stoppage on the occurrence of either a warp or weft fault.

6. In a loom, the combination of warp stop mechanism, a controller adapted to be moved on the occurrenec of a warp fault, a weft detector, a controller movable thereby on the occurrence of a weft fault, a single stopping dog intermediate the two controllers to stop the loom on the occurrence of either a warp or weft fault, a dog positioner actuated by either controller to operatively position the dog to stop the loom, and an actuator for the operatively positioned dog.

7. In a loom, the combination of a series of warp drop wires, a controller adapted to be moved when a drop wire fails to be supported by a warp thread, a weft fork slide, a controller movable thereby on the occurrence of a weft fault, a single dog intermediate the two controllers, a dog positioner, a flexible wire between each of the controllers and dog positioner to operatively position the dog on the occurrence of either a warp or weft fault, and an actuator for moving the single dog to effect loom stoppage.

8. In a loom, the combination of a warp stop mechanism and a weft stop mechanism, a single dog adapted to be operatively positioned by either of said mechanisms on the occurrence of either a warp or weft fault, an actuator for said dog, a cam driven from the crank shaft for reciprocating the actuator to eect loom stoppage through the single dog` on a Warp or Wett fault.

9. n a loom7 the combination ot a warp stop mechanism and a Wett stop mechanism, a single dog adapted to be operatively positioned by either of said mechanisms on the occurrence of either a Warp or Wett fault, an actuator for said dog, a cam on the crank shaft, an actuator adjustably connected to and operated by said cam to eect loom stoppage With the dog,` in desired position on the occurrence ot' either a Warp or Wett fault.

10. In a loom, the combination of a Warp stop mechanism and a weft stop mechanism, a single dog adapted to he operatively positioned by either of said mechanisms on the occurrence of either a warp or weft fault, an actuator for said dog7 a slide mounted on the dog, a rod connecting` the slide to the knock o?, a cam mounted on the crank shaft7 and an actuator connected to the cam for actuating the single dog when operatively positioned by either a Warp or Wett fault.

In testimony whereof, l have signed my name to this speciication.

HAROLD HOEBER 

